Numbers whose Collatz trajectory always alternates between a halving and a tripling step until a power of 2 is reached.
A320020
Numbers whose Collatz trajectory always alternates between a halving and a tripling step until a power of 2 is reached.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =8a(7) =10a(8) =16a(9) =21a(10) =32a(11) =42a(12) =64a(13) =85a(14) =128a(15) =151a(16) =170a(17) =227a(18) =256a(19) =302a(20) =341a(21) =454a(22) =512a(23) =682a(24) =1024a(25) =1365a(26) =2048a(27) =2730a(28) =4096a(29) =5461
External references
- oeis: A320020